Formic Acid → 3-(3,4-dimethoxybenzyl)-6-hydroxy-1-(tetrahydro-2H-thiopyran-4-yl)quinazoline-2,4(1H,3H)-dione

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Reaction Steps

A mixture of 0.200 g of the compound obtained in Step 3.2, and 1.22 g of formic acid is irradiated in a microwave field for 2 minutes at 180° C. The reaction mixture is taken up in EtOAc and then evaporated under reduced pressure. The residue is chromatographed on silica gel, eluting with a CH2Cl2/MeOH mixture from (100/0, v/v) to (97/3, v/v) to give the expected product.

Provenance & Evidence